A new hotfix for USMT 4.0 was released today to support migrating Office 2010 settings.  (It includes other fixes too.)  You may want to download this and integrate it into your deployment processes.  The full instructions for doing this (including what needs to be done with MDT and ConfigMgr) are included in the KB:

http://support.microsoft.com/kb/2023591

There is one complication that you should be aware of if you are using ConfigMgr and moving from Windows XP or deploying Windows XP.  USMT 4.0 uses a set of manifest files to determine what needs to be migrated from Windows XP.  These manifest files are stored in the “DLManifests” folder, which is part of your USMT package in ConfigMgr.  There is an issue though where Scanstate.exe can’t find this DLManifests folder when run from ConfigMgr.  In MDT 2010 Update 1, we included a workaround for this with some logic in ZTIUserState.wsf, copying the folder where Scanstate can find it:

' Workaround for USMT bug in Windows 7 AIK
If oEnvironment.Item("DeploymentMethod") = "SCCM" and oEnvironment.Item("OSVersion") = "XP" and oFSO.GetFileVersion(sFoundScanState) = "6.1.7600.16385" then
    oUtility.RunWithHeartbeat "cmd.exe /c xcopy /iesryhd """ & sUSMTPath &"\DlManifests"" """ & oEnv("SystemRoot") & "\system32\DlManifests" &""" 1>> " & oLogging.LogPath &"\zticopyUSMT.txt 2>>&1 "
End if

Notice that this checks specifically for build 6.1.7600.16385 of Scanstate.exe, the version released in the Windows 7 version of Windows AIK, as we expected this problem to be fixed in the next version of USMT.  Well, it wasn’t.  But once you install the KB 2023591 hotfix, the version changes to 6.1.7601.21645 and our fix stops working.

You can work around this by fixing the fix in ZTIUserState.wsf to read like this:

If oEnvironment.Item("DeploymentMethod") = "SCCM" and oEnvironment.Item("OSVersion") = "XP" and (oFSO.GetFileVersion(sFoundScanState) = "6.1.7600.16385" or oFSO.GetFileVersion(sFoundScanState) = "6.1.7601.21645")  then

If you aren’t using ConfigMgr or don’t have Windows XP around any more, you won’t need to worry about this.